Bob Giesberts / LDC1101

Library to communicate with LDC1101

Dependents:   Inductive_Sensor Inductive_Sensor_Jasper Inductive_Sensor_3

Fork of LDC1000 by First Last

LDC1101.cpp@26:1ef9172cd355, 2016-03-30 (annotated)

Committer:
bobgiesberts
Date:
Wed Mar 30 12:00:10 2016 +0000
Revision:
26:1ef9172cd355
Parent:
25:ae111662ee03
Child:
27:05dd145c7997
In this improved version:;  - Solved the timing issue (error with converting floats to int in sleep);  - Shutdown when Vbatt < 3,10 V;  - Arrays instead of vectors;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bobgiesberts 16:07d0e43c2d12 1 /**
bobgiesberts 16:07d0e43c2d12 2 * @file LDC1101.cpp
bobgiesberts 16:07d0e43c2d12 3 * @brief this C++ file contains all required
bobgiesberts 16:07d0e43c2d12 4 * functions to interface with Texas
bobgiesberts 16:07d0e43c2d12 5 * Instruments' LDC1101.
bobgiesberts 16:07d0e43c2d12 6 *
bobgiesberts 20:8e1b1efdbb49 7 * @author Victor Sluiter & Bob Giesberts
bobgiesberts 16:07d0e43c2d12 8 *
bobgiesberts 16:07d0e43c2d12 9 * @date 2015-12-09
bobgiesberts 16:07d0e43c2d12 10 */
bobgiesberts 16:07d0e43c2d12 11
bobgiesberts 16:07d0e43c2d12 12 #include "LDC1101.h"
bobgiesberts 16:07d0e43c2d12 13
bobgiesberts 16:07d0e43c2d12 14
bobgiesberts 22:8da965ce5af3 15 LDC1101::LDC1101(PinName mosi, PinName miso, PinName sck, PinName cs, float capacitor, float f_CLKIN, PinName clock_out) : _spiport(mosi,miso,sck, NC), _cs_pin(cs) //, _clock(clock_out,1)
bobgiesberts 16:07d0e43c2d12 16 {
bobgiesberts 18:fc9bb81a631f 17 // settings
bobgiesberts 19:e205ab9142d8 18 _cap = capacitor;
bobgiesberts 25:ae111662ee03 19 _LHRoffset = 0;
bobgiesberts 25:ae111662ee03 20 _f_sensor_min = 6.4; // MHz
bobgiesberts 25:ae111662ee03 21 _Rcount = 0xffff; // max
bobgiesberts 22:8da965ce5af3 22
bobgiesberts 16:07d0e43c2d12 23 _spiport.format(8,3);
bobgiesberts 16:07d0e43c2d12 24 _spiport.frequency(1E6);
bobgiesberts 18:fc9bb81a631f 25 setFrequency(f_CLKIN);
bobgiesberts 16:07d0e43c2d12 26
bobgiesberts 16:07d0e43c2d12 27 _cs_pin.write(1);
bobgiesberts 16:07d0e43c2d12 28 wait_us(100);
bobgiesberts 16:07d0e43c2d12 29
bobgiesberts 16:07d0e43c2d12 30 init();
bobgiesberts 16:07d0e43c2d12 31 }
bobgiesberts 16:07d0e43c2d12 32
bobgiesberts 26:1ef9172cd355 33 LDC1101::~LDC1101()
bobgiesberts 26:1ef9172cd355 34 {
bobgiesberts 26:1ef9172cd355 35 // THERE IS A LEAK HERE!!!
bobgiesberts 26:1ef9172cd355 36 // _sd_enable is connected to both the SD card and the LDC1101
bobgiesberts 26:1ef9172cd355 37 // this line should put 0.0 V on the SD card and the LDC1101
bobgiesberts 26:1ef9172cd355 38 // but in reality there still is 0.8 V on both the SD card and the LDC1101
bobgiesberts 26:1ef9172cd355 39
bobgiesberts 26:1ef9172cd355 40
bobgiesberts 26:1ef9172cd355 41 // For all SPI communication pinouts:
bobgiesberts 26:1ef9172cd355 42 // 1) Create a new handle to access the pinout
bobgiesberts 26:1ef9172cd355 43 // 2) Set it to 0 V
bobgiesberts 26:1ef9172cd355 44 // 3) delete and remove the class
bobgiesberts 26:1ef9172cd355 45
bobgiesberts 26:1ef9172cd355 46 // SPI communication with the SD card --> THIS SHOULD BE PART OF THE SDFileSystem CLASS!!!
bobgiesberts 26:1ef9172cd355 47 DigitalOut *sdP2 = new DigitalOut(PTD4);
bobgiesberts 26:1ef9172cd355 48 sdP2->write(0);
bobgiesberts 26:1ef9172cd355 49 delete sdP2;
bobgiesberts 26:1ef9172cd355 50 sdP2 = NULL;// SPI: cs
bobgiesberts 26:1ef9172cd355 51 DigitalOut *sdP3 = new DigitalOut(PTD6);
bobgiesberts 26:1ef9172cd355 52 sdP3->write(0);
bobgiesberts 26:1ef9172cd355 53 delete sdP3;
bobgiesberts 26:1ef9172cd355 54 sdP3 = NULL;// SPI: mosi
bobgiesberts 26:1ef9172cd355 55 DigitalOut *sdP5 = new DigitalOut(PTD5);
bobgiesberts 26:1ef9172cd355 56 sdP5->write(0);
bobgiesberts 26:1ef9172cd355 57 delete sdP5;
bobgiesberts 26:1ef9172cd355 58 sdP5 = NULL;// SPI: sck
bobgiesberts 26:1ef9172cd355 59 DigitalOut *sdP7 = new DigitalOut(PTD7);
bobgiesberts 26:1ef9172cd355 60 sdP7->write(0);
bobgiesberts 26:1ef9172cd355 61 delete sdP7;
bobgiesberts 26:1ef9172cd355 62 sdP7 = NULL;// SPI: miso
bobgiesberts 26:1ef9172cd355 63
bobgiesberts 26:1ef9172cd355 64 // SPI communication with the LDC1101
bobgiesberts 26:1ef9172cd355 65 DigitalOut *senP2 = new DigitalOut(PTC7);
bobgiesberts 26:1ef9172cd355 66 senP2->write(0);
bobgiesberts 26:1ef9172cd355 67 delete senP2;
bobgiesberts 26:1ef9172cd355 68 senP2 = NULL; // SPI: miso
bobgiesberts 26:1ef9172cd355 69 DigitalOut *senP3 = new DigitalOut(PTC5);
bobgiesberts 26:1ef9172cd355 70 senP3->write(0);
bobgiesberts 26:1ef9172cd355 71 delete senP3;
bobgiesberts 26:1ef9172cd355 72 senP3 = NULL; // SPI: sck
bobgiesberts 26:1ef9172cd355 73 DigitalOut *senP4 = new DigitalOut(PTC6);
bobgiesberts 26:1ef9172cd355 74 senP4->write(0);
bobgiesberts 26:1ef9172cd355 75 delete senP4;
bobgiesberts 26:1ef9172cd355 76 senP4 = NULL; // SPI: mosi
bobgiesberts 26:1ef9172cd355 77 DigitalOut *senP5 = new DigitalOut(PTC4);
bobgiesberts 26:1ef9172cd355 78 senP5->write(0);
bobgiesberts 26:1ef9172cd355 79 delete senP5;
bobgiesberts 26:1ef9172cd355 80 senP5 = NULL; // SPI: cs
bobgiesberts 26:1ef9172cd355 81 }
bobgiesberts 26:1ef9172cd355 82
bobgiesberts 26:1ef9172cd355 83
bobgiesberts 26:1ef9172cd355 84 void LDC1101::func_mode(LDC_MODE mode)
bobgiesberts 26:1ef9172cd355 85 {
bobgiesberts 26:1ef9172cd355 86 writeSPI((uint8_t *)(&mode), 0x0B);
bobgiesberts 26:1ef9172cd355 87 wait_ms(0.8);
bobgiesberts 26:1ef9172cd355 88 }
bobgiesberts 22:8da965ce5af3 89
bobgiesberts 22:8da965ce5af3 90 void LDC1101::sleep(void)
bobgiesberts 22:8da965ce5af3 91 {
bobgiesberts 22:8da965ce5af3 92 /* stop toggling the CLKIN pin input and drive the CLKIN pin Low */
bobgiesberts 22:8da965ce5af3 93 func_mode( LDC_MODE_SHUTDOWN );
bobgiesberts 22:8da965ce5af3 94 suicide( this );
bobgiesberts 22:8da965ce5af3 95 }
bobgiesberts 26:1ef9172cd355 96
bobgiesberts 22:8da965ce5af3 97 void LDC1101::wakeup(void) {
bobgiesberts 22:8da965ce5af3 98 /* start toggling the clock input on the CLKIN pin */
bobgiesberts 22:8da965ce5af3 99 init();
bobgiesberts 22:8da965ce5af3 100 wait(0.5);
bobgiesberts 22:8da965ce5af3 101 }
bobgiesberts 20:8e1b1efdbb49 102
bobgiesberts 20:8e1b1efdbb49 103
bobgiesberts 16:07d0e43c2d12 104 void LDC1101::init()
bobgiesberts 16:07d0e43c2d12 105 {
bobgiesberts 20:8e1b1efdbb49 106 /********* SETTINGS *****************
bobgiesberts 25:ae111662ee03 107 ** C_sensor = 120 pF
bobgiesberts 25:ae111662ee03 108 ** L_sensor = 5 uH
bobgiesberts 25:ae111662ee03 109 ** Rp_min = 1500 Ohm
bobgiesberts 20:8e1b1efdbb49 110 **
bobgiesberts 25:ae111662ee03 111 ** RCount = 65535 (max)
bobgiesberts 20:8e1b1efdbb49 112 ** Samplerate = 15.3 Hz
bobgiesberts 20:8e1b1efdbb49 113 ** t_conv = 65.5 ms
bobgiesberts 20:8e1b1efdbb49 114 **
bobgiesberts 25:ae111662ee03 115 ** f_sensor_min = 6.4 MHz (d = inf)
bobgiesberts 25:ae111662ee03 116 ** f_sensor_max = 10 MHz (d = 0)
bobgiesberts 25:ae111662ee03 117 ** divider = 1
bobgiesberts 20:8e1b1efdbb49 118 ************************************/
bobgiesberts 20:8e1b1efdbb49 119
bobgiesberts 20:8e1b1efdbb49 120
bobgiesberts 18:fc9bb81a631f 121 // Set LDC1101 in configuration modus
bobgiesberts 20:8e1b1efdbb49 122 func_mode( LDC_MODE_STANDBY ); // STANDBY = 0x01 naar 0x0B
bobgiesberts 18:fc9bb81a631f 123
bobgiesberts 20:8e1b1efdbb49 124 // - initialise LHR mode & enable SHUTDOWN mode
bobgiesberts 25:ae111662ee03 125 setLHRmode(); // LHR mode
bobgiesberts 25:ae111662ee03 126 // setRPmode(); // RP+L mode
bobgiesberts 16:07d0e43c2d12 127
bobgiesberts 19:e205ab9142d8 128 // - set ResponseTime to 6144
bobgiesberts 20:8e1b1efdbb49 129 setResponseTime( LDC_RESPONSE_6144 );
bobgiesberts 19:e205ab9142d8 130
bobgiesberts 20:8e1b1efdbb49 131 // - set Reference Count to highest resolution
bobgiesberts 25:ae111662ee03 132 setReferenceCount( _Rcount );
bobgiesberts 20:8e1b1efdbb49 133
bobgiesberts 20:8e1b1efdbb49 134 // - set calibrated value for f_sensor_min (d = inf, no target)
bobgiesberts 25:ae111662ee03 135 set_fsensor_min( _f_sensor_min ); // 6.4 MHz
bobgiesberts 18:fc9bb81a631f 136
bobgiesberts 19:e205ab9142d8 137 // - disable RP_MAX
bobgiesberts 22:8da965ce5af3 138 // - set RP_MIN to 1,5 kOhm (RPMIN_1)
bobgiesberts 25:ae111662ee03 139 setRPsettings( 1, RPMAX_96, RPMIN_1 ); // LHR mode
bobgiesberts 25:ae111662ee03 140 // setRPsettings( 0, RPMAX_96, RPMIN_1 ); // RP+L mode
bobgiesberts 16:07d0e43c2d12 141
bobgiesberts 25:ae111662ee03 142 // - set Divider to 1 (for large range / ENOB / resolution)
bobgiesberts 25:ae111662ee03 143 setDivider( DIVIDER_1 );
bobgiesberts 25:ae111662ee03 144
bobgiesberts 25:ae111662ee03 145 // - shift the signal down a bit
bobgiesberts 25:ae111662ee03 146 setLHRoffset( _LHRoffset );
bobgiesberts 18:fc9bb81a631f 147
bobgiesberts 18:fc9bb81a631f 148 // Done configuring settings, set LDC1101 in measuring modus
bobgiesberts 20:8e1b1efdbb49 149 func_mode( LDC_MODE_ACTIVE );
bobgiesberts 16:07d0e43c2d12 150 }
bobgiesberts 16:07d0e43c2d12 151
bobgiesberts 20:8e1b1efdbb49 152 void LDC1101::setLHRmode( void ){
bobgiesberts 20:8e1b1efdbb49 153 writeSPIregister( 0x05, 0x03 ); // ALT_CONFIG: 0000 0011 --> LHR modus + Shutdown enabled
bobgiesberts 20:8e1b1efdbb49 154 writeSPIregister( 0x0C, 0x01 ); // D_CONFIG: Enables LHR modus, disables RP
bobgiesberts 19:e205ab9142d8 155 }
bobgiesberts 19:e205ab9142d8 156
bobgiesberts 25:ae111662ee03 157 void LDC1101::setRPmode( void ){
bobgiesberts 25:ae111662ee03 158 writeSPIregister( 0x05, 0x02 ); // ALT_CONFIG: 0000 0010 --> RP modus + Shutdown enabled
bobgiesberts 25:ae111662ee03 159 writeSPIregister( 0x0C, 0x00 ); // D_CONFIG: Enables LHR modus, disables RP
bobgiesberts 25:ae111662ee03 160 }
bobgiesberts 25:ae111662ee03 161
bobgiesberts 25:ae111662ee03 162 void LDC1101::setRPsettings(bool RP_MAX_DIS, RPMAX rpmax, RPMIN rpmin)
bobgiesberts 19:e205ab9142d8 163 {
bobgiesberts 25:ae111662ee03 164 float rps[] = {96, 48, 24, 12, 6, 3, 1.5, 0.75};
bobgiesberts 25:ae111662ee03 165 _RPmin = rps[rpmin];
bobgiesberts 25:ae111662ee03 166 _RPmax = rps[rpmax];
bobgiesberts 25:ae111662ee03 167 writeSPIregister(0x01, (RP_MAX_DIS << 7) | (rpmax << 4) | rpmin);
bobgiesberts 19:e205ab9142d8 168 }
bobgiesberts 19:e205ab9142d8 169
bobgiesberts 17:a5cf2b4bec13 170 void LDC1101::setDivider(DIVIDER div)
bobgiesberts 17:a5cf2b4bec13 171 {
bobgiesberts 19:e205ab9142d8 172 uint8_t divs[] = {1, 2, 4, 8};
bobgiesberts 19:e205ab9142d8 173 _divider = divs[div];
bobgiesberts 17:a5cf2b4bec13 174 writeSPIregister(0x34, div);
bobgiesberts 20:8e1b1efdbb49 175 }
bobgiesberts 20:8e1b1efdbb49 176
bobgiesberts 25:ae111662ee03 177 void LDC1101::setLHRoffset( uint32_t offset )
bobgiesberts 25:ae111662ee03 178 {
bobgiesberts 25:ae111662ee03 179 _LHRoffset = offset;
bobgiesberts 25:ae111662ee03 180 uint16_t LHR_OFFSET = offset / 256;
bobgiesberts 25:ae111662ee03 181 writeSPIregister(0x32, (uint8_t) (LHR_OFFSET & 0x00ff) ); // LSB
bobgiesberts 25:ae111662ee03 182 writeSPIregister(0x33, (uint8_t) ((LHR_OFFSET & 0xff00) >> 8) ); // MSB
bobgiesberts 25:ae111662ee03 183 }
bobgiesberts 25:ae111662ee03 184
bobgiesberts 20:8e1b1efdbb49 185 void LDC1101::setResponseTime(LDC_RESPONSE responsetime)
bobgiesberts 20:8e1b1efdbb49 186 {
bobgiesberts 20:8e1b1efdbb49 187 uint16_t resps[] = {0, 0, 192, 384, 768, 1536, 3072, 6144};
bobgiesberts 20:8e1b1efdbb49 188 _responsetime = resps[responsetime];
bobgiesberts 25:ae111662ee03 189 uint8_t DIG_CONF[1];
bobgiesberts 25:ae111662ee03 190 readSPI(DIG_CONF, 0x04, 1);
bobgiesberts 25:ae111662ee03 191 writeSPIregister(0x04, (DIG_CONF[0] & 0xF8) + responsetime);
bobgiesberts 20:8e1b1efdbb49 192 }
bobgiesberts 20:8e1b1efdbb49 193
bobgiesberts 20:8e1b1efdbb49 194 void LDC1101::setReferenceCount(uint16_t rcount)
bobgiesberts 20:8e1b1efdbb49 195 {
bobgiesberts 20:8e1b1efdbb49 196 _Rcount = rcount;
bobgiesberts 20:8e1b1efdbb49 197 uint8_t LHR_RCOUNT_LSB = (rcount & 0x00ff);
bobgiesberts 20:8e1b1efdbb49 198 uint8_t LHR_RCOUNT_MSB = ((rcount & 0xff00) >> 8);
bobgiesberts 20:8e1b1efdbb49 199 writeSPIregister(0x30, LHR_RCOUNT_LSB); //LSB
bobgiesberts 20:8e1b1efdbb49 200 writeSPIregister(0x31, LHR_RCOUNT_MSB); //MSB
bobgiesberts 20:8e1b1efdbb49 201 }
bobgiesberts 20:8e1b1efdbb49 202
bobgiesberts 20:8e1b1efdbb49 203 void LDC1101::setSampleRate(float samplerate){ setReferenceCount( ((_fCLKIN/samplerate)-55)/16 ); }
bobgiesberts 17:a5cf2b4bec13 204
bobgiesberts 17:a5cf2b4bec13 205
bobgiesberts 25:ae111662ee03 206 void LDC1101::set_fsensor_min(float f_sensor_min)
bobgiesberts 16:07d0e43c2d12 207 {
bobgiesberts 25:ae111662ee03 208 uint8_t DIG_CONF[1];
bobgiesberts 25:ae111662ee03 209 readSPI(DIG_CONF, 0x04, 1);
bobgiesberts 25:ae111662ee03 210 uint8_t MIN_FREQ = 16.0f - (8.0f / f_sensor_min);
bobgiesberts 25:ae111662ee03 211 writeSPIregister(0x04, ((MIN_FREQ << 4) + (DIG_CONF[0] & 0x0f)));
bobgiesberts 20:8e1b1efdbb49 212 }
bobgiesberts 20:8e1b1efdbb49 213
bobgiesberts 25:ae111662ee03 214 float LDC1101::get_fsensor_min()
bobgiesberts 22:8da965ce5af3 215 {
bobgiesberts 25:ae111662ee03 216 uint8_t DIG_CONF[1];
bobgiesberts 25:ae111662ee03 217 readSPI(DIG_CONF, 0x04, 1);
bobgiesberts 25:ae111662ee03 218 return (float) 8.0f/(16.0f - (float) ((DIG_CONF[0] & 0xf0) >> 4));
bobgiesberts 22:8da965ce5af3 219 }
bobgiesberts 20:8e1b1efdbb49 220
bobgiesberts 25:ae111662ee03 221 bool LDC1101::is_New_LHR_data(void) { return(!(get_LHR_status() & 0x01)); }
bobgiesberts 25:ae111662ee03 222 bool LDC1101::is_Oscillation_Error(void) { return(get_status() & 0x80); }
bobgiesberts 20:8e1b1efdbb49 223
bobgiesberts 22:8da965ce5af3 224 uint8_t LDC1101::get_status(void)
bobgiesberts 22:8da965ce5af3 225 {
bobgiesberts 25:ae111662ee03 226 uint8_t status[1];
bobgiesberts 25:ae111662ee03 227 readSPI(status, 0x20, 1);
bobgiesberts 25:ae111662ee03 228 return status[0];
bobgiesberts 22:8da965ce5af3 229 }
bobgiesberts 20:8e1b1efdbb49 230
bobgiesberts 22:8da965ce5af3 231 uint8_t LDC1101::get_LHR_status(void)
bobgiesberts 22:8da965ce5af3 232 {
bobgiesberts 25:ae111662ee03 233 uint8_t LHR_status[1];
bobgiesberts 25:ae111662ee03 234 readSPI( LHR_status, 0x3B, 1 );
bobgiesberts 25:ae111662ee03 235
bobgiesberts 25:ae111662ee03 236 // ERR_ZC: (LHR_status & 0x10) >> 4 //
bobgiesberts 25:ae111662ee03 237 // ERR_OR: (LHR_status & 0x08) >> 3 //
bobgiesberts 25:ae111662ee03 238 // ERR_UR: (LHR_status & 0x04) >> 2 // 1 = LHR_DATA < 0 because LHR_OFFSET > LHR_DATA
bobgiesberts 25:ae111662ee03 239 // ERR_OF: (LHR_status & 0x02) >> 1 //
bobgiesberts 25:ae111662ee03 240 // LHR_DRDY: (LHR_status & 0x01) // 1 = Data ready
bobgiesberts 25:ae111662ee03 241
bobgiesberts 25:ae111662ee03 242 return LHR_status[0];
bobgiesberts 22:8da965ce5af3 243 }
bobgiesberts 20:8e1b1efdbb49 244
bobgiesberts 25:ae111662ee03 245
bobgiesberts 25:ae111662ee03 246 /* CALCULATE STUFF WITH SENSOR DATA */
bobgiesberts 25:ae111662ee03 247
bobgiesberts 20:8e1b1efdbb49 248 float LDC1101::get_Q(void){ return _RPmin * sqrt(_cap/_inductance*1000000); }
bobgiesberts 16:07d0e43c2d12 249
bobgiesberts 19:e205ab9142d8 250
bobgiesberts 25:ae111662ee03 251 float LDC1101::get_fsensor( uint32_t Ldata )
bobgiesberts 16:07d0e43c2d12 252 {
bobgiesberts 25:ae111662ee03 253 // LHR mode
bobgiesberts 25:ae111662ee03 254 if( Ldata == 0 ) { Ldata = get_LHR_Data(); }
bobgiesberts 25:ae111662ee03 255 _fsensor = _fCLKIN * _divider * (Ldata + _LHRoffset)/16777216; // (p.26)
bobgiesberts 25:ae111662ee03 256
bobgiesberts 25:ae111662ee03 257 // RP+L mode
bobgiesberts 25:ae111662ee03 258 // if( Ldata == 0 ) { Ldata = get_L_Data(); }
bobgiesberts 25:ae111662ee03 259 // _fsensor = (_fCLKIN * 6144) / (3 * Ldata); // (p.31)
bobgiesberts 25:ae111662ee03 260
bobgiesberts 18:fc9bb81a631f 261 return _fsensor;
bobgiesberts 19:e205ab9142d8 262 }
bobgiesberts 18:fc9bb81a631f 263
bobgiesberts 25:ae111662ee03 264 float LDC1101::get_Inductance( uint32_t Ldata )
bobgiesberts 18:fc9bb81a631f 265 {
bobgiesberts 25:ae111662ee03 266 float fsensor = get_fsensor( Ldata );
bobgiesberts 25:ae111662ee03 267 _inductance = 1./(_cap * 4*PI*PI*fsensor*fsensor); // (p.34)
bobgiesberts 19:e205ab9142d8 268 return _inductance;
bobgiesberts 19:e205ab9142d8 269 }
bobgiesberts 16:07d0e43c2d12 270
bobgiesberts 16:07d0e43c2d12 271
bobgiesberts 25:ae111662ee03 272 /* GETTING DATA FROM SENSOR */
bobgiesberts 25:ae111662ee03 273
bobgiesberts 25:ae111662ee03 274 float LDC1101::get_RP( uint16_t RPdata )
bobgiesberts 25:ae111662ee03 275 {
bobgiesberts 25:ae111662ee03 276 if( RPdata == 0 )
bobgiesberts 25:ae111662ee03 277 {
bobgiesberts 25:ae111662ee03 278 RPdata = get_RP_Data();
bobgiesberts 25:ae111662ee03 279 }
bobgiesberts 25:ae111662ee03 280
bobgiesberts 25:ae111662ee03 281 return (_RPmax * _RPmin) / ( _RPmax * (1.0f - ((float) RPdata / 65535.0f)) + _RPmin * ((float) RPdata / 65535.0f));
bobgiesberts 25:ae111662ee03 282 // return _RPmax * (1.0f - ((float) RPdata / 65535.0f));
bobgiesberts 25:ae111662ee03 283 }
bobgiesberts 25:ae111662ee03 284
bobgiesberts 18:fc9bb81a631f 285 uint32_t LDC1101::get_LHR_Data(void)
bobgiesberts 16:07d0e43c2d12 286 {
bobgiesberts 18:fc9bb81a631f 287 uint8_t LHR_DATA[3];
bobgiesberts 18:fc9bb81a631f 288 readSPI(LHR_DATA, 0x38, 3); // 0x38 + 0x39 + 0x3A
bobgiesberts 20:8e1b1efdbb49 289 return (LHR_DATA[2]<<16) | (LHR_DATA[1]<<8) | LHR_DATA[0];
bobgiesberts 16:07d0e43c2d12 290 }
bobgiesberts 16:07d0e43c2d12 291
bobgiesberts 25:ae111662ee03 292 uint16_t LDC1101::get_RP_Data(void)
bobgiesberts 25:ae111662ee03 293 {
bobgiesberts 25:ae111662ee03 294 uint8_t RP_DATA[2];
bobgiesberts 25:ae111662ee03 295 readSPI(RP_DATA, 0x21, 2); // 021 + 0x22
bobgiesberts 25:ae111662ee03 296 return (RP_DATA[1]<<8) | RP_DATA[0];
bobgiesberts 25:ae111662ee03 297 }
bobgiesberts 25:ae111662ee03 298
bobgiesberts 25:ae111662ee03 299 uint16_t LDC1101::get_L_Data(void)
bobgiesberts 25:ae111662ee03 300 {
bobgiesberts 25:ae111662ee03 301 uint8_t L_DATA[2];
bobgiesberts 25:ae111662ee03 302 readSPI(L_DATA, 0x23, 2); // 023 + 0x24
bobgiesberts 25:ae111662ee03 303 return (L_DATA[1]<<8) | L_DATA[0];
bobgiesberts 25:ae111662ee03 304 }
bobgiesberts 25:ae111662ee03 305
bobgiesberts 25:ae111662ee03 306
bobgiesberts 16:07d0e43c2d12 307 void LDC1101::readSPI(uint8_t *data, uint8_t address, uint8_t num_bytes)
bobgiesberts 16:07d0e43c2d12 308 {
bobgiesberts 16:07d0e43c2d12 309 // CSB down
bobgiesberts 16:07d0e43c2d12 310 _cs_pin.write(0);
bobgiesberts 16:07d0e43c2d12 311 _spiport.write(address | 0x80); //read flag
bobgiesberts 16:07d0e43c2d12 312 for(int i=0; i < num_bytes ; i++)
bobgiesberts 16:07d0e43c2d12 313 {
bobgiesberts 16:07d0e43c2d12 314 data[i] = _spiport.write(0xFF);
bobgiesberts 16:07d0e43c2d12 315 }
bobgiesberts 16:07d0e43c2d12 316 // CSB up
bobgiesberts 16:07d0e43c2d12 317 _cs_pin.write(1);
bobgiesberts 16:07d0e43c2d12 318 }
bobgiesberts 16:07d0e43c2d12 319
bobgiesberts 16:07d0e43c2d12 320 void LDC1101::writeSPI(uint8_t *data, uint8_t address, uint8_t num_bytes)
bobgiesberts 16:07d0e43c2d12 321 {
bobgiesberts 16:07d0e43c2d12 322 // CSB down
bobgiesberts 16:07d0e43c2d12 323 _cs_pin.write(0);
bobgiesberts 16:07d0e43c2d12 324
bobgiesberts 16:07d0e43c2d12 325 _spiport.write(address);
bobgiesberts 16:07d0e43c2d12 326 for(int i=0; i < num_bytes ; i++)
bobgiesberts 16:07d0e43c2d12 327 {
bobgiesberts 16:07d0e43c2d12 328 _spiport.write(data[i]);
bobgiesberts 16:07d0e43c2d12 329 }
bobgiesberts 16:07d0e43c2d12 330 // CSB up
bobgiesberts 16:07d0e43c2d12 331 _cs_pin.write(1);
bobgiesberts 16:07d0e43c2d12 332 }
bobgiesberts 16:07d0e43c2d12 333
bobgiesberts 16:07d0e43c2d12 334
bobgiesberts 16:07d0e43c2d12 335 // EXTRA test: Get&print values of all variables to verify (to calculate the induction)
bobgiesberts 16:07d0e43c2d12 336 // The data will be printed on the screen using RealTerm: baud 9600.
bobgiesberts 16:07d0e43c2d12 337 // Begin ***********************************************************
bobgiesberts 25:ae111662ee03 338 float LDC1101::get_fCLKIN() {return _fCLKIN;}
bobgiesberts 25:ae111662ee03 339 uint8_t LDC1101::get_divider() {return _divider;}
bobgiesberts 25:ae111662ee03 340 uint32_t LDC1101::get_LHRoffset() {return _LHRoffset;}
bobgiesberts 25:ae111662ee03 341 float LDC1101::get_RPmin() {return _RPmin;}
bobgiesberts 25:ae111662ee03 342 float LDC1101::get_RPmax() {return _RPmax;}
bobgiesberts 25:ae111662ee03 343 float LDC1101::get_cap() {return _cap;}
bobgiesberts 16:07d0e43c2d12 344 // END ***********************************************************